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xfs: fail dax mount if reflink is enabled on a partition

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Failure notification is not supported on partitions.  So, when we mount a
reflink enabled xfs on a partition with dax option, let it fail with
-EINVAL code.

Link: https://lkml.kernel.org/r/20220609143435.393724-1-ruansy.fnst@fujitsu.com
Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Shiyang Ruan 2022-06-09 22:34:35 +08:00 committed by akpm
parent 873f64b791
commit 35fcd75af3
1 changed files with 4 additions and 2 deletions
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6
fs/xfs/xfs_super.c
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@ -350,8 +350,10 @@ xfs_setup_dax_always(
goto disable_dax;
}
if (xfs_has_reflink(mp)) {
xfs_alert(mp, "DAX and reflink cannot be used together!");
if (xfs_has_reflink(mp) &&
bdev_is_partition(mp->m_ddev_targp->bt_bdev)) {
xfs_alert(mp,
"DAX and reflink cannot work with multi-partitions!");
return -EINVAL;
}